source: trunk/src/gui/effects/qgraphicseffect.h@ 855

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#ifndef QGRAPHICSEFFECT_H
#define QGRAPHICSEFFECT_H

#include <QtCore/qobject.h>
#include <QtCore/qpoint.h>
#include <QtCore/qrect.h>
#include <QtGui/qcolor.h>
#include <QtGui/qbrush.h>

#ifndef QT_NO_GRAPHICSEFFECT
QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Gui)

class QGraphicsItem;
class QStyleOption;
class QPainter;
class QPixmap;

class QGraphicsEffectSource;

class QGraphicsEffectPrivate;
class Q_GUI_EXPORT QGraphicsEffect : public QObject
{
    Q_OBJECT
    Q_FLAGS(ChangeFlags)
    Q_PROPERTY(bool enabled READ isEnabled WRITE setEnabled NOTIFY enabledChanged)
public:
    enum ChangeFlag {
        SourceAttached = 0x1,
        SourceDetached = 0x2,
        SourceBoundingRectChanged = 0x4,
        SourceInvalidated = 0x8
    };
    Q_DECLARE_FLAGS(ChangeFlags, ChangeFlag)

    enum PixmapPadMode {
        NoPad,
        PadToTransparentBorder,
        PadToEffectiveBoundingRect
    };

    QGraphicsEffect(QObject *parent = 0);
    virtual ~QGraphicsEffect();

    virtual QRectF boundingRectFor(const QRectF &sourceRect) const;
    QRectF boundingRect() const;

    bool isEnabled() const;

public Q_SLOTS:
    void setEnabled(bool enable);
    void update();

Q_SIGNALS:
    void enabledChanged(bool enabled);

protected:
    QGraphicsEffect(QGraphicsEffectPrivate &d, QObject *parent = 0);
    virtual void draw(QPainter *painter) = 0;
    virtual void sourceChanged(ChangeFlags flags);
    void updateBoundingRect();